main.go | 3 +++
 run.go  | 3 ++-

diff --git a/main.go b/main.go
index 37f9a843d6ba9fa9f4decf6db807546331b3e0d83d2a5f00e2349ea687d21a96..921a6ad3bfbc5076a1c91645c8e44e9f1cd764cf890feb07b96e8ba125afb6d4 100644
--- a/main.go
+++ b/main.go
@@ -145,6 +145,9 @@ 	if Debug || os.Getenv(EnvLogPid) == "1" {
 		MyPid = os.Getpid()
 	}
 	var traced bool
+	if *flagTraceAll {
+		mustSetenv(EnvTrace, "1")
+	}
 	if *flagTrace {
 		traced = true
 	} else {
diff --git a/run.go b/run.go
index 6b6740ad0f55fe1a0eca7946fff3b5a4c90227a456ea03fea03fdda067e5d5e9..ef5e1326bde7cdaeceb018854ea54f08cf0cc959f368dd08fcfbc604ce4ec1ed 100644
--- a/run.go
+++ b/run.go
@@ -62,7 +62,8 @@ 	StderrSilent bool = false
 	StderrPrefix string
 	Jobs         sync.WaitGroup
 
-	flagTrace        = flag.Bool("x", false, fmt.Sprintf("trace current target (sh -x) (set %s=1 for all others)", EnvTrace))
+	flagTrace        = flag.Bool("x", false, "trace (sh -x) current targets")
+	flagTraceAll     = flag.Bool("xx", false, fmt.Sprintf("trace (sh -x) all targets (%s=1)", EnvTrace))
 	flagStderrKeep   = flag.Bool("logs", false, fmt.Sprintf("keep job's stderr (%s=1)", EnvStderrKeep))
 	flagStderrSilent = flag.Bool("silent", false, fmt.Sprintf("do not print job's stderr (%s=1)", EnvStderrSilent))
 )